Effects of sulfur oxyanions and magnetite on the corrosion behavior of alloy 600 under simulated PWR secondary water conditions

被引：0

作者：

Han, Jeoh ^{[1
,2
]}

Hur, Do Haeng ^{[1
]}

Song, Geun Dong ^{[3
]}

Jeon, Soon-Hyeok ^{[1
]}

机构：

[1] Korea Atom Energy Res Inst, Mat Safety Technol Res Div, Daejeon, South Korea

[2] Korea Hydro & Nucl Power Co Ltd, Cent Res Inst, Daejeon, South Korea

[3] FNC Technol Co Ltd, Nucl Mat Res Grp, Gyeonggi Do, South Korea

来源：

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T | 2024年 / 33卷

基金：

新加坡国家研究基金会;

关键词：

Alloy; 600; Sulfur oxyanions; Magnetite; Corrosion; Oxide film; Potentiodynamic polarization; GENERATOR TUBING ALLOYS; GALVANIC CORROSION; QUANTITATIVE ASSESSMENT; CHLORIDE-IONS; CRACKING; STRESS; LEAD; TEMPERATURE; THIOSULFATE; SULFATE;

D O I：

10.1016/j.jmrt.2024.11.270

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This study investigates the corrosion behavior of Alloy 600 in sulfur oxyanions (sulfate and tetrathionate) solutions. The corrosion rate and oxide thickness of Alloy 600 drastically increase by the presence of sulfur oxyanions in the environment. The phenomenon is mainly caused by tetrathionate ions, not sulfate ions. When Alloy 600 and magnetite are electrically connected in the solutions, they respectively behave as an anode and a cathode. This galvanic coupling effect further accelerates the corrosion of Alloy 600. The preferential dissolution of Ni and reduction of tetrathionate result in the formation of an oxide layer composed of Ni-depleted Cr-Fe oxides and Ni3S2 compounds.

引用

页码：9693 / 9702

页数：10

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